最新的导出文档方法

// 最新的导出文档方法
说明：参数 dt 可以是Html字符串

public void ExportToExcel(string FieldType, string FileName, string dt)
        {
            System.Web.HttpContext.Current.Response.Charset = "utf-8";
            System.Web.HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8).ToString());
            System.Web.HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
            System.Web.HttpContext.Current.Response.ContentType = FieldType;
            StringWriter tw = new StringWriter();
            System.Web.HttpContext.Current.Response.Output.Write(dt);
            System.Web.HttpContext.Current.Response.Flush();
            System.Web.HttpContext.Current.Response.End();
        }